The aim of this study is to compare the pain relief effect of two methods, namely oral glucose 10 percent and expressed breast milk, in full term neonates during venous blood sampling among hyperbilirubinemic neonates. In this research, the population under study was the full term neonates who were allowed to be fed by mouth. These neonates were needed to be venipunctured, while have not received any sedative and palliative three hours before venipunturing, at least, as well as their mothers. Exclusion criteria for the study includes: regardless of reason it was not possible to do the 2nd venipuncture after the first one. Two sampling processes were constantly and accessibly done on a group of 35 infants, who were chosen randomly, in two days. At the first day the infants were fed breast milk, and on the second day they were fed 10 percent glucose. Each of the investigation on all of the infants have been done in two different days. Both days, infants were fed one milliliters of expressed breast milk or glucose 10 percent two minutes before blood sampling. The pain was measured using neonatal infant scale (NIPS). This instrument measures behavioral indexes of the infant (such as facial expressions, cry and state of arousal, arms and legs movement) and physiological indexes (such as breathing patterns). The measurement outcomes for each infant vary from zero to seven.